Engine accessory system



.Feh. 3, E c HOR ENGINE AccEssmr sysma Filed April 1, 1939 2 She ets-Sheet 1 INVENTOR i/ezw/z 6T WOR/OAZ ATTORNEYS Feb. 3, 1942. E. s. HORTQN I 2,272,037 ENGINE ACCESSORY SYSTEM Filed April 1, 1939 2 Sheets-Sheet 2 E/Qw/Q v ATTORNEYS trated in the accompanying desi s, wherein:

. tion,

P aten te'd Feb. 3, 1942 UNITED STATES [PA ENT OFFICE ENGINE ACCESSORY SYSTEM Erwin .0. Horton Hamburg, N. Y.,Iasslgnor to Trico Products Corporation,

corporation Buffalo, N. 2., a

Application April 1, 1939, Serial No. 265,614

Claims. (01.123-198) This invention relates to an automotive or internal combustion engine accessory system, and

has particular relation to systems depending for their operation upon fluid being drawn therefrom into thetfluid intake of an engine.

Certain types ofinternal combustion engine and automotive accessories, such as suction operated fans, windshield cleaners, and pumps, employ for their operation the pressure differential between the atmosphere and the intake manifold of the engine. Air, under substantially at- -.mospheri c pressure, is taken into the accessory the engine'is diluted with air from the accessory when the'latter is in operation.

This dilution of the mixture results in a loss of power produced by the engine, or, if com? pensated for by adjustment of the carburetor toincrease the ratio of fuel, willcause waste of fuel when the accessory is not in operation.

According to the present invention, means are provided to carburet the air which operates the accessory before discharging the latter into. the

for carbureting such air is made adjustable so. that the ratio of fuel to air produced thereby may correspond to the fuel to air ratio produced by the engine carburetor. In this way the engine will operate with the same efflciency whether or not the accessory is in operation.

These and other objects and advantages will become apparent from the following description of the typical embodiment of the invention illus- Fig. 1 is aside elevation of the'fore portion of. a motor .vehicle with parts, thereof broken. away to illustrate the application of the present in-' vention;' I

Fig. 2 is a side elevational view, partly in secillustrating the mixing valve of the invention mountedv upon the carburetor andmanifold assembly of the engine shown inFig. 1;

Fig. 3 is a longitudinal sectional view of the suction operated accessory shown in Fig. 1; r v Fig. 4 is a cross-sectional view of the suction operated accessory;

Fig. 5 is a diagrammatic view illustrating a 1 55 ture .of fuel and air eirectedby unit 35- can be modified embodiment of the invention; and

Flg.-6 is a sectional view of the mixing valve appearing in Fig. 5.

As shown -in Fig.1, the internal combustion engine I l of the motor vehicle I2 has a carburetor Usually the dislb or mixing valve [3 and an intake manifold 14. The carburetor has a float chamber or similar reservoir 15 wherein fuel preferably is maintained to a substantially uniform level. Mounted on the vehicle is a suction operated accessory I6 having a fluid inlet H and a fluid outlet or exhaust l8.

In the embodiment illustrated, the accessory is a turbine having a casing l9, a wheel H with impeller blades M, and a shaft 23 upon which the wheel is mounted. A fan 24 carried by shaft 23 propels air through a heat exchange unit or .radiator mounted within shell 25, water heated by the engine being circulated-through the unit via tubes 26 and 21.

engine intake. Preferably the mixing valve used 80 Fluid is exhausted from casing 19 through outlet !8, and. througlran outlet conduit 28 connected thereto, into theintake manifold l4, the connection between conduit 28 and the manifold being indicated at 29. Fluid under more nearly atmospheric pressure entering the casing l9 through the inlet l1 impinges upon turbine blades 22 folxeffecting rotation of the wheel, shaft and.

fan assembly. The rate of entry of fluid, and the speedof the fan, may be controlled, stopped or started by a valve 3| controlled bya knob. 32

through the linkage 33.

' pipe 4|.

mounted upon the carburetor by a bracket 42 ,or

' that fluid is being drawn-into the'manifold from Entering fluidiis conducted to inlet IT through an'inlet conduit 34 extended from a mixing valve 35'. The latter has an atmospheric intake opening 36, an outlet 31 opening into conduit 34, and

into the interior 'of the valve being adjustably controlled by a needle valve 39. Fuel is supplied to passage 38 from the reservoir 15 through a If desired, the mixing valve 35 may be by other suitable means.

When during operation of the engine the'valve 3| is closed sothat the accessorysystem is not operating, no fluid will pass through the mixing valve. When the-valve 3| is-open, however, so

, the'accessory, air will enterthe latter through the mixing valve and conduit 34. Passing through the mixing valve the air;.will be carbureted with fuel which is induced, by the air flow, into the mixing valve through conduit 4| and passage 38.

- By suitably adjusting needle valve 33,- the mixa fuel inlet passage 38, the opening of the latter made to correspond with that produced by the engine carburetor 13, so that the engine will receive the same kind of fuel and air mixture regardless of whether or not the accessory system is in operation.

In the form of the invention illustrated -in Fig. 5, atmospheric air enters directly into the accessory intake H, and a mixing valve 42 (shown in detail in Fig. 6) is provided in the'exhaust or outlet conduit 43 leading from the accessory outlet to the manifold M. The mixing valve 42, like mixing valve 35, has a fuel inlet passage 38 communicating with the fuel reservoir through a pipe M, and a needle valve 39 for regulating the proportion of fuel mixed with air discharging from the accessory into the intake manifold.

It will be understood that the apparatus herein shown and described is merely illustrative of the -inventive principles involved, which principles may be otherwise embodied without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

1. In combination with an internal combustion engine having an intake manifold and a carburetor with a float chamber, a device including a turbine having an inlet and an outlet for fluid for operating said turbine, an inlet conduit having one end thereof open to the atmosphere and the other end thereof opening into said inlet, a mixing valve in said conduit, means for conducting fuel from the fioat chamber to said mixing valve, and an exhaust conduit for conducting fluid from said outlet to the intake manifold.

2. In combination with an internal combustion engine having an intake with a carburetor, a prime mover in the form of a turbine having an inlet and an outlet for fluid operating the turbine, said outlet being connected to said in-' serving to further admix the fuel and air passing therethrough.

3. In combination with an internal combustion engine having an intake with a carburetor, a

fluid pressure operated device having an outlet passage connected to said intake and having an air inlet passage, a mixing valve associated with said inlet passage for mixing fuel with air entering said fluid pressure operated device, the latter operatingto agitate and further admix said fuel and air prior to discharge thereof into said in-' take.

4. In combination with an internal combustion engine having an; intake with a carburetor having a float chamber, a suction operated device having an air inlet passage and having an air outlet passage connected to said intake of the engine, and a mixing valve in said air inlet passage for mixing fuel with air passing therethrough, said air inlet passage being open to the atmosphere at the end thereof opposite from the, suction operated device and thereby being sub-' ject to atmospheric pressure when there is mo substantial flow of air through said suction operated device, said mixing valve having a fuel- 7 and a mixing valve in said air inlet passage for mixing fuel with air passing therethrough, said ,air inlet passage being open to the atmosphere at the end thereof opposite from the suction operated device and thereby being subject to at mospheric pressure when there is no substantial flow of air through said suction operated device, said mixing valve having a fuel discharge orifice opening thereinto and in constant communication with said fuel reservoir, said mixing valve being disposed above the fuel level in said fuel reservoir and fuel being induced into the mixing valve through said orifice by the passage of air therethrough.

ERWIN C. HORTON. 

